diff --git a/src/proto/move.pro b/src/proto/move.pro
index de8bf51..07a70d2 100644
--- a/src/proto/move.pro
+++ b/src/proto/move.pro
@@ -35,6 +35,7 @@
 void f_virtcol2col(typval_T *argvars, typval_T *rettv);
 void scrolldown(long line_count, int byfold);
 void scrollup(long line_count, int byfold);
+void adjust_skipcol(void);
 void check_topfill(win_T *wp, int down);
 void scrolldown_clamp(void);
 void scrollup_clamp(void);